using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Text;
using System.Windows.Forms;

namespace Calculator
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MemoryStream ms = new MemoryStream();
            StreamWriter sw = new StreamWriter(ms);
            sw.Write(this.comboBox1.Text);
            sw.Flush();
            Parser parser = new Parser(new Scanner(ms));
            parser.Parse();
            this.textBox1.Text = parser.result.ToString();
        }
    }
}